From: Fabian Frederick <fabf@skynet.be>
Date: Sat, 13 Jun 2015 03:47:33 +0000 (-0400)
Subject: ext4: use swap() in mext_page_double_lock()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=bf86546760502b24e16fad75e3affde61efb5e2c;p=linux-beck.git

ext4: use swap() in mext_page_double_lock()

Use kernel.h macro definition.

Thanks to Julia Lawall for Coccinelle scripting support.

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---

diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 370420bfae8d..8c04afb90b1b 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -166,12 +166,9 @@ mext_page_double_lock(struct inode *inode1, struct inode *inode2,
 	 */
 	wait_on_page_writeback(page[0]);
 	wait_on_page_writeback(page[1]);
-	if (inode1 > inode2) {
-		struct page *tmp;
-		tmp = page[0];
-		page[0] = page[1];
-		page[1] = tmp;
-	}
+	if (inode1 > inode2)
+		swap(page[0], page[1]);
+
 	return 0;
 }